In Nigeria, undergraduate degrees (excluding Medicine, Medical Laboratory Science, Nursing, Engineering, Law and Architecture) are four-year-based courses. Medicine (MBBS) and Architecture normally take six years to complete studies while Medical Laboratory Science, Nursing, Law and Engineering courses take five years to complete studies, usually, all six years are taken to improve their chances.
The South African system usually has a three-year undergraduate bachelor's degree, with two or three majors. (There are exceptions, such as the medical qualification (MBChB), which is six years.) A fourth year, known as an Honours year, is considered a post-graduate degree. It is usually course-driven, although may include a project or thesis.
Brazil follows the major traits of the continental European system; free public schools are available from kindergarten up to postgraduation, both as a right established in Article 6, caput of the Brazilian Constitution and as a duty of the State in Article 208, Items I, IV and V, of the Brazilian Constitution. Students choose their specific course of studies before joining the university. Admission to university is obtained by means of a competitive entrance exam known as Vestibular (a concept somewhat similar to the Baccalauréat in France). There's a new system, adopted by most federal universities, that uses the high school national examination (ENEM) result as part or a replacement of the Vestibular grade. Depending on the chosen course, upon graduating the student shall be granted: a technologist diploma, 3 years to complete, a bachelor's degree's diploma, which usually takes 4 or, in the case of Law, Veterinary, Geology and Engineering, 5 years to complete; or a professional diploma, which normally require 5 or, in the case of medicine, 6 years to complete.
In the United States of America undergraduate refers to those who are studying for a bachelor's degree. The most common method consists of four years of study leading to a Bachelor of Arts (B.A.), a Bachelor of Science (B.S.), or sometimes another bachelor's degree such as Bachelor of Fine Arts (B.F.A.), Bachelor of Music (B. Mus.), Bachelor of Social Work (B.S.W.), Bachelor of Engineering (B.Eng.), Bachelor of Science in Public Affairs (B.S.P.A), Bachelor of Science in Nursing (B.S.N.), or Bachelor of Philosophy (B.Phil.) Five-Year Professional Architecture programs offer the Bachelor of Architecture Degree (B.Arch.) or sometimes Master of Architecture degree (M.Arch.).
Unlike in the British model, degrees in law and medicine are not offered at the undergraduate level and are completed as professional study after earning a bachelor's degree. Neither field specifies or prefers any undergraduate major, though medical schools have set prerequisite courses that must be taken before enrollment.